<?php
session_start();
ob_start();
function create_image() 
{ 
$md5_hash = md5(rand(0,999)); 
$security_code = substr($md5_hash, 15, 5); 
$_SESSION["security_code"] = $security_code;
$width = 100; 
$height = 30; 
$image = ImageCreate($width, $height); 
$white = ImageColorAllocate($image, 255, 255, 255); 
$black = ImageColorAllocate($image, 0, 0, 0); 
ImageFill($image, 0, 0, $black); 
ImageString($image, 5, 30, 6, $security_code, $white); 
header("Content-Type: image/jpeg"); 
ImageJpeg($image); 
ImageDestroy($image); 
} 
create_image() ;
exit();
?>

